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Radium and Thorium Periodic Table
f
Radium
Thorium
Thorium and Radium in Periodic Table
Summary
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Periodic Table
Symbol
Ra
Th
Group Number
2
16
0
18
Period Number
7
7
Block
s block
f block
Element Family
Alkaline Earth
Actinide
CAS Number
7440144
99+
7440326
99+
Space Group Name
Im_ 3m
P63/mmc
Space Group Number
229.00
2
194.00
7
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